Browse Prior Art Database

Electronic/Manual Forms Thickness Control Mechanism for a Wire Matrix Print Head Printer

IP.com Disclosure Number: IPCOM000035234D
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 60K

Publishing Venue

IBM

Related People

Burke, JL: AUTHOR [+2]

Abstract

The present device print head adjusting mechanism is constructed to be either manually adjustable to a range of spacings of print head from a platen or automatically responsive to a signal for one of two different spacings to thereby admit either a thick or a thin material on which printing is to occur.

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Electronic/Manual Forms Thickness Control Mechanism for a Wire Matrix Print Head Printer

The present device print head adjusting mechanism is constructed to be either manually adjustable to a range of spacings of print head from a platen or automatically responsive to a signal for one of two different spacings to thereby admit either a thick or a thin material on which printing is to occur.

Fig. 1 shows the device in the minimum clearance position with respect to platen 10, for use with the thin material. The device includes a frame member 12 pivotally mounted on a rear support shaft 14. The frame carries the print head
16. A primary cam shaft 18 is rotatably mounted on projection 20 of the frame member 12. The cam shaft 18 also has an extension 22 which mounts a cam member 24 having section 26 and 28 and cam member 30 which has section 32 and 34. Cam members 24 and 30 are keyed together to rotate as a unit, while shaft

(Image Omitted)

18 rotates independent of them. A frame support shaft 36 carries a carrier support beam 38. An adjusting screw 40 extends through the housing 12 and is positioned to coact with the section 28 of cam 24. The position shown in Fig. 1 is the minimum clearance position. In this position the cam 18 is on high dwell and rests on support beam 38. Also cam 24 is on high dwell, supporting the housing by engagement with adjusting screw 40. A mechanism (not shown) is mounted on the front support shaft for coaction with cam 30 to initially ret...